
So the three equations are
Option B
Option C
Option E
When you collect like terms for the equation given above, you have
0.5 + 10b + 4 = 19.5
10b = 19.5 - 0.5 - 4
10b = 19 - 4
Moving the 4 back to the left, we now have
10b + 4 = 19 (B)
Also, if you multiply both sides of the equation by 2, you now have
2(0.5b + 10b + 4) = 2 (19.5)
2(0.5b + 10b + 4) = 39
Finally, if all like terms are collected and simplified, you have
10b = 19.5 - 0.5 - 4
10b = 15